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Indian-origin scientist at MIT develops system that can read closed books
An Indian origin scientist along with other scientists from MIT and Georgia Tech has developed a new technology that can be used to read books without opening them.
This book can be used by archaeologists to read the contents of antique books without opening them. In the study recently published in the journal Nature Communications, researchers under the leadership of Ramesh Raskar from Massachusetts Institute of Technology (MIT) had tested a prototype of the system on a stack of papers with one letter printed on it. In the tests, the system was able to correctly identify the letters on the top nine sheets.

As per reports, the new technology uses Terahertz radiation, a band of electromagnetic radiation between microwaves and infrared light. What differentiates Terahertz radiation from other kinds of waves like X-rays or sound waves is that while these waves are unable to distinguish between the ink and blank paper, Terahertz radiation is able to easily distinguish between the two.

The system uses the statistics of the reflected Terahertz electric field at subwavelength gaps to lock into each layer position and then uses a time-gated spectral kurtosis to tune to highest spectral contrast of the content on that specific layer, thus enabling it to read the contents of the pages without opening it.

"The Metropolitan Museum in New York showed a lot of interest in this, because they want to, for example, look into some antique books that they don't even want to touch," said Barmak Heshmat, a research scientist at MIT.

While the system developed could clearly read upto 9 stacked pages, more improvements are underway as researchers are constantly working to enhance the accuracy of Terahertz imaging.

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